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What does catalyst do to a reaction?
Slows down the reaction
Speeds up the reaction
What do you call the energy that is required to start a reaction?
Which of the reaction pathway shows the catalysed reaction?
What happen to the rate of reaction when a catalyst is added to it?
Catalysts may be in the state of ___________.
Solid and liquid only
Liquid and gases only
Solid and gases only
Solid, liquid or gases
How does a catalyst work in speeding up a reaction?
By lowering the activation energy or reaction
by making them more available
by giving them more energy
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?
Red, because the activation energy is larger
Blue, because the activation energy is lower
both reaction progress at the same rate
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.
A catalyst increases the efficiency of collisions between reactants.
What is the name given to a catalyst in the human body?
Most enzymes are composed of .....
Enzymes in your body probably work best at which of the following temperatures>
What is the purpose of an enzyme?
give permission for the reaction
speed up reactions
raise activation energy
control how many reactions occur
What is another name for enzymes?
What catalyst is used for hydrogen peroxide?
enzyme and magnesium dioxide